Two-hand control



Sept. 7, 1943.

B. J. YANCHENKO TWO-HAND CONTROL Filed Dec. 12, 1941 3 Sheets-Sheet 2 BASIL J. YANCHENKO ATTORNEYS Patented Sept. 7, 1943` warren rari-nr ISyracske; Y.; 'f The Prosperity Company, Inc., Syac e; N; Y;

This' invention relates to two hand controls for' Ipower operated machines; the operation of which may be dangerous t'o the operator, as power presses," punch presses, garment and laundry presses, etc.

The inventionr has for its object' a; twohand control in which substantially .simultaneousl ,Opf eration of both manuals is requiredandln'Which the operation of each manual operates means which controls the effective-operationofjhe other manual, and more specically, blocking means operating when either manual onlyis operated to block the effective operation" of the other manual. t It further has for its object a shifterforshift'- ing the blocker and controlled by the manuals, and also more specifically a blocker normally arranged in inoperative position, and a shifter therefor` normally arrangedl ini central; position and shiftable in either direction fromcentral position to shift the blocker upon they operation of either only of the manuals, andr tjo loeheld in central position by the substantially simultaneous operation of both manuals.

Y It further hasfor i-ts object a two hand conf trol including the ,blocking rneansorg` its e'guiyn'- alent controlled by theY manuals; ,andi motion transmitting means between the manuals-and afcontrol means, as for instance; a Valveforyalves controlling theflow of power to a'machimgto be operated, which motion transmitting; nljeans includes a differential mechanism, L one form ing a differential lever, .which tilts whenu only one manual is operated, and ,hence transmits nofmotion and which moves Arectiline'arly Vv vithout tilting when both manualsqare `operatedin unison, and hence transmitsgrnQtiOriv tO-,thecongtrol means controlling the' ow ofy power to'the machine to be operated.

1t further has for its object atvvo y which is particularly compact andnunitaify construction and readily` applied' to thesitua-tion inrvvhich it is to be used. l o o, The' invention consists' in the; ,nllelg features andin the combinations vand constructions hereinafter set forth 'and claimed; o A L In describing thisvv invention;y reference had to' the accompanying drawings in Whichjlike characters designate: correspondingrp'arts f in' all lthe'cview's; `Figurel is a-front elevation of`r thistwo lhand Vcontrol unit.k l

Figure 2'is a plan View thereof;

. Y Figure 1 3V is' ai sectonalview on' line 3l-31,*

mea

levers 2, 3 respectively. Each of the pivots at I4 and I5 includes a slot through which the pivot extends, to permit play of the lever during the tilting movement thereof about its fulcrum. The motion o' the lever is here shown as transferable through a head Iii of a bolt threading through the lever centrally thereof and held in any adjusted position by a nut Il. Obviously, depression yof either only of the manual levers 2, 3 will result in tilting of the lever I3 about the pivotal point Ill or I5 adjacent the other vbetween the ends of the plung'ers and the exhaust manual lever, and movement of both manual levers 2, 3 in unison effects a vertical rectilinear movement of the lever I3, causing the head I6 to depress the stem 1 of the control valve 6.

The means operable by either manualfor con-j trolling the effective operation of the other manself-closing as by a spring 36. The valves are mounted on the frame I adjacent the diaphragm chambers 23, 2d respectively and are connected thereto by couplings 3l. The valve members 32 are operated by the manual levers 2, 3 respectively through suitable parts, as a plunger 38 pivoted at 39 to the manual lever 2 or 3 and extending axially intobores in the casing of the valve or 3l. lThe plungers thrust against the movable valve members of the valves 33, 3| preferably through yielding means, as springs 4I), interposed ated substantially simultaneously or in unison,

- the-,valve members 32 oi both valves 30, 3| will ual operates, in the illustrated exempli'ication of acting oppositely on the shifter I9 with equal force when both manuals are operated simultaneously and one only acting thereon, and thereby shifting the shifter out of central position when either onlyl of the manuals is operated. t

The blocking member I8 is here shown as a bar or bolt slidably mounted on a support carried by the frame I and having its ends 2|] normally ,arranged out of the path of the manual levers 2,

3 and one or the other of the ends being shiftable into the path of one of the levers when only one manual is operated. The shifter I9 is here shown as a rock arm pivoted at 2| to a supportV carried bythe frame, and having its free end extending into anopening` 22 in the blocking bar I8 so that swinging of the shifter I9 about the pivot 2| shifts the blocking bar I8 in one directionvor the other.

The actuating devices for the shifter I3, in this embodiment of the invention, is shown as preslsure or air operated, as the motive fluid used for the operation of the machine is compressed air.

23 and 24 designate,respectively, the pressure operated devices, these being for convenience diaphragm chambers having diaphragme 25, 26 therein acting on opposite ends of a doubleA ended plunger 2l which has a head 28 betweenI its ends ,formedl with a passage 29 through which the shifterv arm I9 extends. The diaphragm chambers are arranged on opposite sides of the shifter I3 and the diaphragms through the double plunger 2l act oppositely on the shifter I9. The ilow of pressure fluid or air to the pressure sides of the diaphragm chambers is controlled by control members or valves operated by the manuals 2, 3 respectively.

33, 3| designate the valves whichk are two-way or combined intake and exhaust valves.` Each of these valves comprises .a suitable casing, a valve member 32 therein having a normally closed intake valve head 33 and a normally open exhaust valve head 34 connected together by a stem to act las a u nit. The `intake or lower end ofthe valve be operated to open the intake heads 33 and close the exhaust Valve heads 34, permitting the air to entrer the casing of the valves Sil, 3| from the mainline 8 and thence through the couplings 3? into the pressure sides of the diaphragm chambers 24 and thus act equally on the diaphragms 25, 25, so that the shifter I9, and hence the blocking bar IS, remains in central position'. The simultaneous operation of the manual levers causes the differential lever I3 to move 'rectilinearly downwardly and depress the stem 'I of the control valve 3 to open this control valve and permit air to pass from the main line 8 through the casing of the valve 6 and through the pipe 3 to the cylinder IG of the machineto be operated. The release of the levers permits the exhaust of air from the cylinder II) back through the pipe 9, valve casing 3|, and outv through the exhaust passage 4I of the valve 6. Also, the release of the manual levers 2, 3 permits the 'exhaust of air from the diaphragm chambers out through the exhaust ports 42 of the valves 3), 3E and the closing of the intake valve head 33 and opening of the exhaust valve head 34. lThe valve G is of substantially the same construction as the valves 35|, 3|. When only one manual is operated, as for instance, as seen in Figure 5, where only the left hand manual 3 is shown as operated, the movable valve member 3,2 of the left hand valve 3| only is operated, so that only the diaphragm 25 in the diaphragm chamber 2li is energizedthus causing the shifter to be shifted to the right, as seen in Figure 5, and operating the blocking bar I8 into position to block vthe subsequent operation of the right hand manual 2.`Such operation of only one of the manual levers causes a tilting ofthe differential 'lever I3; as seen in Figure 5, without suicient movement to" operate the valve 6. Upon the release of one manual lever, as the lever 3, that is operated, the parts return to their normal position, so that' the machine may be' thenv operated by depressing both levers 2,3 substantially simultaneously. The movement of the double plunger 27| is against the action of returning springs' 43', 44 acting oppositely on the plunger 21 and tending to return the plunger to central 'position'. These springs are normally of substantially the same strength but when only one is compressed by the operation of one manual, its force is suicient to return the shifterY I9 to central position.

lAll the parts of this device are mounted as a unit on the' frameV I in juxtaposition to each other. The manual levers 2, 3 are pivoted to v the frame.v The diaphragm chambers 23, 24 are mounted on a support 45 mountable-on the'frame I. The shifter I9 is pivoted to, and theblocking bar I 8 is slidably mounted on,`thisA support 45. The control valves 6, 30 and 3| mounted on the frame l and also the couplings for connecting the valves 6, 3G and 3| to the main air line 8 are carried by the frame l. Thus, the two hand control may be applied as a unit to the machine to be controlled thereby. i

By this two hand control, it is impossible to operate a machine with one manual only or by tying down one manual. The operation of one manual only disables the operation of the other manual and the actuating movement of both manuals through a differential mechanism effects the opening of the control'valve or other control member for the machine to be operated and prevents the opening of the control Valve by the operation ofl but one manual.

What I claim is:

l. A two hand control including a pair of manuals, control means for controlling'the ow of power to operate a machine, means controlled by the manuals, when operated simultaneously, for effecting the operation of the -control means, blocking means normally out of blocking position and operable by each manual when operated individually into position to block the effective operation of the other manual, the last means including a blocking member, a shifter normally arranged in central position and movable laterally in opposite directions from central position and connected to the blocking member to shift the same in one direction or the other, a pair of power operated devices acting equally in opposite directions on the shifter, and controls for the power to said devices operated respectively by the manuals.

2. A two hand control including a pair of manuals, control means for controlling the flow of power to operate a machine, means controlled by the manuals, when operated simultaneously,

. for effecting the operation of the control means,

blocking means normally out of blocking position and operable by each manual when operated individually into position to block the effective operation of the other manual, the last means including a blocking member, a shifter normally arranged in central position and movable laterally in opposite directions from central position and connected to the blocking member to shift the same in one direction or the other, a pair of` pressure operated devices acting equally in opposite directions on the shifter, and valves for controlling the flow of pressure fluid to said devices operated respectively by the manuals.

3. A two hand control including a pair of manuals, control means for controlling the flow of power to operate a machine, means controlled by the manuals for effecting the operation of the control means including a differential element connected to the manuals to be operated thereby, and motion transmitting means operated by the differential element to operate the control means, a blocking member normally arranged in neutral position and shiftable into position to block the operation of either of the manuals, a shifter connected to the blocking member normally arranged in central position and shiftable in opposite directions from central position, and power operated devices paired with the manuals and controlled respectively thereby and acting when energized oppositely with equal force on the shifter,` whereby upon the operation of either manual only the shifter is shifted from central position and shifts the blocker into position to block the operation ofthe other manual, and simultaneous operation of both manuals is required to hold the shifter in central position.

4. A two hand control including a pair of manuals, a main line for a motive fluid, valve means for controlling the flow of the fluid to operate a machine, operable by the substantially simultaneous operation of the manuals, means operable by each manual for controlling the effective operation of the other manual including shiftable mechanism and a pair of pressure operated motors acting, when energized, oppositely and equally on said mechanism and connected in the main line, and valves operated respectively by the manuals and located to control the flow of motive fluid to said motors respectively.

5. A two hand control including a pair of manuals, a main line for a motive uid, Valve means for controlling the flow of the fluid to operate a machine, operable by the substantially simultaneous operation of the manuals, a blocking member normally arranged in central position and shiftab-le in different directions from central position into position to block one or the other of the manuals,. a shifter therefor, a pair of pressure operated motors acting, when energized, oppositely and equally in opposite directions on the shifter, conduitsconnecting the motors to the main line and valves operated respectively by the manuals in said conduits.

BASIL J. YANCHENKO. 

